person.rb

module Messenger
  class Person

    @@people = []

    def initialize(attributes={})
      @attributes = { :global_id => nil, :name => nil }.merge(attributes)
    end

    def self.create!(attributes={})
      person = Person.new(attributes)
      person.save
      person
    end

    def global_id=(v); @attributes[:global_id] = v; end
    def global_id; @attributes[:global_id]; end
    def name=(v); @attributes[:name] = v; end
    def name; @attributes[:name]; end

    def save
      @@people << self
    end

    def self.find(global_id)
      @@people.select do |person|
        person.global_id == global_id
      end.first
    end

     def self.find_by_name(name)
      @@people.select do |person|
        person.name == name
      end
    end

    def self.delete_all
      @@people = []
    end
  end
end